问在JavaScript中查找数组中数组的索引位置

EN

var a = [[1,0],[0,1],[0,0]],

b = a.reduce((a,c,i)=>{
  a[c] = i;
  return a;      
},{});

console.log('Index of [0,0] is ' +b[ [0,0] ] )

var array = [[1, 0], [0, 1], [0, 0]],
    find = [0, 0],
    index = -1;

array.some(function (a, i) {
    if (a.length === find.length && a.every(function (b, j) { return b === find[j]; })) {
        index = i;
        return true;
    }
});

console.log(index);

var a = [[1,0],[0,1],[0,0]], len = a.length,
        search_item = [0,1], pos = -1;

while (len--) {
    if ((a[len].length === search_item.length) 
            && a[len].every(function(el, i){ return el == search_item[i]; })) {
        pos = len;
        break;
    }
}

console.log(pos);